simonwillison.net

Latest posts

• Introducing GPT‑5.3‑Codex‑Spark

  Feb 12, 2026
• Quoting Anthropic

  Feb 12, 2026
• Covering electricity price increases from our data centers

  Feb 12, 2026
• Gemini 3 Deep Think

  Feb 12, 2026
• An AI Agent Published a Hit Piece on Me

  Feb 12, 2026
• Supervisor, not overseer

  Feb 12, 2026
• Quoting Andrew Deck for Niemen Lab

  Feb 11, 2026
• Skills in OpenAI API

  Feb 11, 2026
• GLM-5: From Vibe Coding to Agentic Engineering

  Feb 11, 2026
• cysqlite - a new sqlite driver

  Feb 11, 2026
• Introducing Showboat and Rodney, so agents can demo what they’ve built

  Feb 10, 2026
• Structured Context Engineering for File-Native Agentic Systems

  Feb 09, 2026
• AI Doesn’t Reduce Work—It Intensifies It

  Feb 09, 2026
• Kākāpō mug by Karen James

  Feb 08, 2026
• Quoting Thomas Ptacek

  Feb 08, 2026
• Vouch

  Feb 07, 2026
• Claude: Speed up responses with fast mode

  Feb 07, 2026
• Quoting David Crawshaw

  Feb 07, 2026
• How StrongDM's AI team build serious software without even looking at the code

  Feb 07, 2026
• Quoting Tom Dale

  Feb 06, 2026
• Running Pydantic's Monty Rust sandboxed Python subset in WebAssembly

  Feb 06, 2026
• An Update on Heroku

  Feb 06, 2026
• Quoting Karel D'Oosterlinck

  Feb 06, 2026
• Mitchell Hashimoto: My AI Adoption Journey

  Feb 05, 2026
• Opus 4.6 and Codex 5.3

  Feb 05, 2026
• Spotlighting The World Factbook as We Bid a Fond Farewell

  Feb 05, 2026
• Voxtral transcribes at the speed of sound

  Feb 04, 2026
• Distributing Go binaries like sqlite-scanner through PyPI using go-to-wheel

  Feb 04, 2026
• Introducing Deno Sandbox

  Feb 03, 2026
• January sponsors-only newsletter is out

  Feb 03, 2026